期刊
FRONTIERS IN PLANT SCIENCE
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2022.900262
关键词
melatonin; axillary bud; nitrogen; amino acid; OsAAP14; rice
资金
- Wuhan Science and Technology Project [2020020601012259]
- Guizhou Education Department [Qian jiao he KY zi (2021) 024]
- Key Cultivation Project of Guizhou University [201903]
This study reveals the important role of melatonin in the regulation of axillary bud outgrowth in rice plants. Moderate concentrations of melatonin alleviate the inhibition of axillary bud outgrowth caused by high concentrations of basic amino acids. Transcriptome analysis suggests that genes involved in nitrogen metabolism and phytohormone signal transduction pathways are involved in the regulation of axillary bud outgrowth by melatonin.
Melatonin plays an important role in plant resistance to biotic and abiotic stresses. However, whether melatonin is involved in the regulation of plant architecture, such as the formation of axillary bud outgrowth or tillering, in rice remains unknown. Here, we found that different concentrations of melatonin influenced axillary bud outgrowth in rice, and moderate melatonin concentrations also alleviated the inhibition of axillary bud outgrowth in the presence of high concentrations of basic amino acids lysine and arginine. Furthermore, transcriptome analysis demonstrated that genes involved in nitrogen metabolism and phytohormone signal transduction pathways may affect axillary bud outgrowth, which is regulated by melatonin. We determined that the differentially expressed genes glutamine synthetase OsGS2 and amino acid transporter OsAAP14, which are involved in nitrogen metabolism and are regulated by melatonin and basic amino acids, were the key regulators of axillary bud outgrowth in rice. In addition, we validated the functions of OsGS2 and OsAAP14 using rice transgenic plants with altered axillary bud outgrowth and tillers. Taken together, these results suggest that melatonin mediates axillary bud outgrowth by improving nitrogen assimilation and transport in rice.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据